A binary operation ? ? is defined is defined by a ? ? b = a + b + 1 for any real numbers a and b. Find the inverse of the real number 7 under the operation ...

Question 1 Report

A binary operation $Δ$ is defined is defined by a $Δ$ b = a + b + 1 for any real numbers a and b. Find the inverse of the real number 7 under the operation $Δ$ , if the identify element is -1

-1

-7

-9

Answer Details

a $Δ$ b = a + b + 1
a $Δ$ a-1 = e
7 $Δ$ 7-1 = 7 + 7-1
therefore 7-1 = -1 - 8
= -9
the inverse of 7 under the operation $Δ$ is -9

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Binary Operations

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